/* Copyright 2013-2015 www.snakerflow.com.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.snaker.engine.impl;

import org.snaker.engine.ITaskService;
import org.snaker.engine.SnakerEngine;
import org.snaker.engine.SnakerInterceptor;
import org.snaker.engine.core.Execution;
import org.snaker.engine.entity.Task;
import cn.hutool.core.util.StrUtil;

/**
 * 委托代理拦截器 负责查询wf_surrogate表获取委托代理人，并通过addTaskActor设置为参与者 这里是对新创建的任务通过添加参与者进行委托代理(即授权人、代理人都可处理任务) 对于运行中且未处理的待办任务，可调用engine.task().addTaskActor方法 {@link ITaskService#addTaskActor(String, String...)}
 * 
 * @author yuqs
 * @since 1.4
 */
public class SurrogateInterceptor implements SnakerInterceptor {
    public void intercept(Execution execution) {
        SnakerEngine engine = execution.getEngine();
        for (Task task : execution.getTasks()) {
            if (task.getActorIds() == null)
                continue;
            for (String actor : task.getActorIds()) {
                if (StrUtil.isBlank(actor)) {
                    continue;
                }
                String agent = engine.manager().getSurrogate(actor, execution.getProcess().getName());
                if (StrUtil.isNotBlank(agent) && !actor.equals(agent)) {
                    engine.task().addTaskActor(task.getId(), agent);
                }
            }
        }
    }
}
